bab4_data_excel = read.xlsx("Bab4DataExcel01.xlsx", header = FALSE , 1)
bab4_data_excel

bab4_data_excel = read.xlsx("Bab4DataExcel01.xlsx", header = FALSE , 2)
bab4_data_excel

bab4_data_excel = read.xlsx("Bab4DataExcel02.xlsx", 1)
bab4_data_excel

bab4_data_excel = read.xlsx("Bab4DataExcel02.xlsx", 2)
bab4_data_excel
